A paid advertising agency buys attention on your behalf and is judged on whether that attention turned into revenue. It is one of the few marketing services with a clean scoreboard, which is why the good ones are comfortable being measured and the weak ones steer the conversation toward impressions, reach and awards. The important decisions happen before the first campaign: which fee model you accept, who owns the accounts, what counts as a conversion and what you will do if the target is missed. Get those right and the relationship is manageable. Get them wrong and you will spend a quarter arguing about a dashboard. This page sets out the trade and the questions that matter.
Fee models and the behaviour each one produces
Percentage of ad spend is the most common model and the easiest to understand, but it rewards larger budgets and pays the agency the same whether the money worked or not. Flat retainers are neutral and make candidates directly comparable, though a fixed fee on a small account can eat an uncomfortable share of the gross profit. Performance fees tied to conversions or revenue sound aligned and often are, provided the attribution is agreed in advance and the agency is not simply claiming credit for demand you already had. Hybrids of a base fee plus a smaller variable component are the usual compromise. Whatever the model, ask what hours it funds and which named people deliver them, and ask what happens to the fee if you halve the budget. Also ask whether the agency receives any incentive, rebate or partner benefit tied to the platforms it recommends, and get that answer in writing.
What good account management actually looks like
Beyond the setup, paid media is a weekly discipline: search term review and negatives, budget reallocation between what is working and what is not, creative iteration, audience and bid adjustments, and landing page testing. Ask a candidate to describe their weekly and monthly cadence and who performs each task, because the difference between an account touched weekly by an experienced buyer and one left on automated settings is enormous and invisible from the outside. Creative volume matters more than it used to, particularly on paid social, so ask how many new assets are produced per month and by whom. On search, ask how they handle brand terms, since bidding on your own name can look wonderfully efficient while mostly buying clicks you would have received free. A serious agency will tell you which parts of your current account they would switch off in week one.
The compliance you carry, not the agency
Advertising claims are your legal responsibility even when someone else wrote them. The FTC's guidance on online advertising and marketing states that the same consumer protection rules that apply offline apply online, and its advertising guidance for small business explains that objective claims must be truthful and substantiated before they run. Disclosures matter too: the FTC's .com Disclosures guidance sets out that necessary disclosures must be clear and conspicuous, which is a practical constraint on small ad formats and short video. Ask any candidate who reviews claims before a campaign goes live and what their process is when a client asks for a claim they cannot support. This is the same discipline the better advertising companies apply to every format they buy, and the absence of it is a cost that arrives later, all at once.
Vetting a shortlist
Ask for the smallest account size the agency accepts, the contract term and the notice period. Insist that the ad accounts, pixels, tags and analytics properties are owned by you with access granted to the agency, because rebuilding conversion history after a bad separation is expensive and slow. Ask for a sample report and check whether it separates new customers from returning ones and whether it states what was actually changed that month. Ask for two references at your budget scale rather than their flagship client, and ask those references what happened in the month a target was missed. Finally, ask for a written ninety day plan with the specific first month actions named. A candidate who cannot produce that after a discovery call is planning to work it out while billing you.
Questions people ask about paid advertising agency
What is a reasonable management fee?
Percentages vary widely by account size and complexity, and a single benchmark is not useful. The comparison that is useful: convert every proposal into a monthly cost and a monthly hours figure with named roles, then compare those. Two agencies quoting the same percentage frequently fund very different amounts of real work.
How much budget do I need to start?
Enough to gather statistically meaningful data within your decision window, which depends far more on your cost per click and conversion rate than on any general rule. Ask a candidate to model the spend needed to reach a decision on one campaign at your costs, and be sceptical of anyone who cannot do that arithmetic in a meeting.
Should the agency own my ad accounts?
No. Create the accounts under your own business identity and grant the agency access. The historical data in those accounts is an asset that improves performance over time, and losing it at the end of a relationship is a real and avoidable cost. Put ownership in the contract rather than assuming it.
How quickly should I expect results?
Search campaigns aimed at existing demand can produce enquiries in days, though efficiency usually improves over the first two or three months as negatives, bids and creative settle. Demand generation on paid social takes longer to judge. Agree the evaluation window and the decision rule before launch, not after the first disappointing week.